2 Mac problems (weird sound and window problem)

1) you know how the mouse cursor automatically dissapears while your typing? well once it does the computer makes an annoying noise going *eeeeeeee* that's really annoying especially when i'm trying to type a long message such as this one.

2) You know how when you minimize a window it sucks it into the dock with a cool animation?
well it stopped doing that, it simply just dissapears now and also when I clickt he 2 side buttons expose doesn't open to show all the windows.
I looked through system prefrences and cant find anything to fix these.